Wylfa nuclear power station near the village of Cemaes in Anglesey, Wales. Photograph: Paul Ellis/AFP/Getty Images

Plans for new nuclear power stations in the UK have suffered a setback as Chinese financial backing for two new reactors has failed to materialise, and a bid by French nuclear group Areva has not been submitted.

On Wednesday, French nuclear engineering group Areva told the Guardian that it had dropped its interest – in partnership with the China Guangdong Nuclear Power Group – in bidding for Horizon. "Areva and CGNPC have suspended their interest in the planned sale of Horizon Nuclear Power and did not submit a bid," an Areva spokeswoman said, adding that the company was still committed to new nuclear in the UK through other avenues.

Areva's withdrawal leaves bids by a consortium led by US nuclear engineering company Westinghouse – reportedly without the involvement of the China National Nuclear Power Corporation, as has been previously floated – and one by Japan's Hitachi, whose nuclear techonology is not yet licensed for use in the UK.

A decision is expected within weeks, but if either failed to proceed because of financial or other challenges, that would leave EDF as the main developer committed to building new nuclear reactors in the UK. The French state company already owns and operates eight of the UK's 10 existing nuclear power stations, and is due to make a final investment decision on a new reactor at Hinkley Point in Somerset by the end of the year.